Step 2: Reach around to the back of your turn signals to twist and unlock your
turn signal bulb. Detach the OEM glass lightbulb from the plastic
base.

Step 3: Replace the stock glass light bulb with the LED turn signal/DRL
light bulb. Plug in the switchback LED light bulb into your turn signal lens
socket along with the silicone base. Plug in the T20 adapter to the plastic base on the stock harness.

Step 4: You can either mount the resistor to a metal portion of your
car frame or let it hang as shown below. Repeat steps 1-4 on the other side.

Step 5: Once your switchback LED turn signal/daytime running light
bulbs are fully installed, tap the third wires on both the driver's side and passenger's side to the wiring harness. Route the wiring harness to your fuse box
and connect it to your ACC 12V+.

Step 6: Test your LED turn signal/DRL light bulbs to make sure the
bulbs shine in xenon white when you turn on the engine, and in amber yellow when your
turn signals are on. Once you've confirmed that your switchback LED bulbs are
functioning as they should, put back your bezel cover to finish. You can now
enjoy your Nissan Altima's xenon white/amber yellow LED daytime running
lights/turn signal lights!

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